Subnets

Class A Host/Subnet Table
Class A
Number of
Bits Borrowed Subnet Effective Number of Number of Subnetfrom Host Portion Mask Subnets Hosts/Subnet Mask Bits
------- --------------- --------- ------------- -------------
1255.128.0.0 2 8388606 /9
2 255.192.0.0 4 4194302 /10
3255.224.0.0 8 2097150 /11
4 255.240.0.0 16 1048574 /12
5255.248.0.0 32 524286 /13
6 255.252.0.0 64 262142 /14
7 255.254.0.0128 131070 /15
8 255.255.0.0 256 65534 /16
9 255.255.128.0 51232766 /17
10 255.255.192.0 1024 16382 /18
11 255.255.224.0 2048 8190/19
12 255.255.240.0 4096 4094 /20
13 255.255.248.0 8192 2046 /2114 255.255.252.0 16384 1022 /22
15 255.255.254.0 32768 510 /2316 255.255.255.0 65536 254 /24
17 255.255.255.128 131072 126 /25
18...